The Milwaukee® Open-Lok™ 1-1/8" Titanium Charged™ Bi-Metal Thin Metal Oscillating Multi-Tool Blades Are Made From Premium High-Speed Steel. These Bi-Metal Blades Are Ideal For Cuts In Thin Metal, Nails, PVC, and Drywall. Titanium Charged™ Bi-Metal Blades Have An Optimized Titanium Blend For Maximum Wear-Resistance and Up to 15X Longer Life VS. High Carbon Steel (HCS) Blades. These Blades Feature A Reinforced Universal Fit Open-Lok™ Anchor For Better Strength & Control and Allow For Quick Blade Changes Acro